<Privately Operated Websites>

Questions and Answers

<General Information about Web Archiving Project (WARP)>

We archive the websites of the national, prefectural, and municipal governments, including those of prefectures, designated cities, cities, and towns as well as committees for municipal mergers, independent administrative corporations, semi-governmental corporations or agencies, universities, events, online periodicals, and similar sites.

National institution websites are archived once per month, and the websites of other institutions subject to collection under the provisions of the National Diet Library Law are archived four times per year. Websites of institutions that are not subject to collection under the provisions of the National Diet Library Law are generally archived once per year. Online periodicals are archived as they are published to avoid omissions and according to whether or not past issues are available.

We welcome and encourage other websites to link to pages of the WARP. No permission is necessary to do so, but please be sure that links are labelled clearly to indicate that WARP is the destination site.

<Online Periodicals>

At the National Diet Library (NDL), the term "online periodicals" is used to refer to any digital information that is published periodically on a network under a single title and on an ongoing basis with successive volume numbers and dates. Of these, the NDL preserves those that are available free of charge on the Internet.

We use the same volume numbers used by the online periodicals themselves, and take the volume number from the original article or selection itself. Volume numbers for issues that contain only tables of contents are not recorded in the metadata even when archived.

<Browsing Archived Websites>

Websites archived by WARP are displayed with a banner at the top of the webpage that provides information about when the page was archived. The WARP banner is displayed to help ensure that users are aware the content they are browsing is an archive and the information is quite possibly out of date.
* These notes do not always display properly due to the layout or kinds of files.

All websites archived by WARP are available for browsing on the premises at the NDL. In cases where the copyright holder has granted permission to do so, the NDL also makes archived content available via the Internet. There are some websites, however, for which the copyright holder has not granted such permission, and these are available for browsing only on the premises at the NDL.

There are technical limitations on the types of files that we can archive. We do not archive some files, including the types listed below.

Files that are stored in a database

Files that can be streamed or played back as they are downloaded

Files that are set to exclude bots

Some for which links are generated dynamically with JavaScript

Style sheet files and JavaScript files

Files with a corrupted character code

Please note that some links will direct you to the live website rather than of an archived page. You can verify whether the webpage you are viewing has been archived by WARP or is part of a live website by checking the URL in the address bar of your browser. Also, archived websites generally have the WARP banner displayed at the top of the page.

WARP uses JavaScript to display archived content. Please enable JavaScript in your browser settings. Issues with your network may also cause a delay when following links. If you have trouble loading a particular webpage, wait a while and then try to load it again.

WARP archives information from the Web by copying it to the NDL server and then providing access to users. Thus, webpages that display the time and date dynamically might not always display this information correctly.

WARP archives websites according to date. This error message is displayed when the target page of the link you followed was not archived on the same date as the previous page. Even when this message is displayed, the page you are looking for could be included in another title or under a different date. Please search again based on the results that appear on the webpage.

The copyright to archived websites is retained by the original copyright owner. Care is needed when using archived materials to respect the copyright and limit your reuse of such material to the extent permitted by copyright law. You are responsible for obtaining permission from the original copyright holder when you intend to reprint images, documents, articles, data, or other content from archived websites.

Search results are sorted by relevance according to the frequency with which keywords appear in the content. Webpages with the highest frequency appear at the top of the search results. In addition to frequency, document size and other factors affect the order of relevance.

The NDL will accept requests for photoduplication of archived webpages from websites for which it has already obtained permission from the copyright holder. But we cannot make copies of webpages from websites for which the NDL has not already obtained permission from the copyright holder.

When content from institutional repositories is available to the general public via the Internet, it is considered to be continually available to the public for an extended period of time. Since this availability is not subject to change except under special circumstances, there is no need for the NDL to archive such content. Therefore, content on the National Institute of Informatics Current Institutional Repositories (IR) List is not archived by the NDL.

<Privately Operated Websites>

We archive the content of privately operated websites from which we have obtained permission to do so. Our main focus is on archiving content from the websites of non-profit incorporated associations and foundations, private universities, political parties, and international or cultural events as well as those pertaining to the East Japan Great Earthquake, online periodicals, and others. The process is as follows.

1. The NDL selects candidates.

2. The NDL sends the website operator a request for permission to archive.

3. Interested website operators respond to the request.

4. The NDL configures a web crawler based on information contained in the response and begins to archive the website's content. In the event of technical issues, archiving might be cancelled.

5. Webpages become available to the general public via WARP once we have confirmed that there are no technical issues related to archiving.